Figgs/Hayman burial place Worceste Co

I am searching for the burial place of my gggrandparents, John Thomas Hayman b. 1832 and Lavinia E. Figgs Hayman b 1837.In the 1870 maryland census they were living in the Coulbourn District in Worcester CO., MD.My grandmother, their youngest child, was born in 1879 and I believe they both died when she was young. Thanks! Jerrod